Eirdu, Carrier of Dawn
Mikaeus, the Unhallowed
Altar of Dementia

   Prerequisites

What do I need to start this combo?
All permanents on the battlefield (Eirdu as Isilu, Carrier of Twilight on the battlefield).
You control another nontoken non-Human creature with base toughness 2 or greater.

   Steps

How does this combo work?
1
Activate Altar of Dementia by sacrificing another nontoken non-Human creature
2
When the creature dies, its undying ability triggers, returning the creature from your graveyard to the battlefield with a +1/+1 counter on it.
3
Activate Altar of Dementia by sacrificing the creature with a +1/+1 counter on it.
4
When the creature dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
5
Resolve the Altar of Dementia abilities from step 1 and 3.
6
Repeat.

   Results

What do I get from this combo?
Infinite LTB
Infinite ETB
Infinite sacrifice triggers
Infinite death triggers
Infinite mill
Infinite self-mill
Eirdu, Carrier of Dawn
18%inclusion576 decks3.16K decks
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0.0%inclusion2 decks13.8K decks
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New Cards
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29%inclusion191 decks648 decks
28%synergy
Sunderflock
29%inclusion2 decks7 decks
27%synergy
Emptiness
28%inclusion179 decks648 decks
27%synergy
Rhys, the Evermore
28%inclusion127 decks461 decks
27%synergy
The Reaper, King No More
20%inclusion1 decks5 decks
13%synergy
High Synergy Cards
Ashnod's Altar
85%inclusion554 decks648 decks
79%synergy
Phyrexian Altar
77%inclusion498 decks648 decks
73%synergy
Viscera Seer
81%inclusion523 decks648 decks
73%synergy
Murderous Redcap
73%inclusion16 decks22 decks
71%synergy
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67%synergy
Carrion Feeder
70%inclusion452 decks648 decks
65%synergy
Zulaport Cutthroat
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65%synergy
Pitiless Plunderer
73%inclusion474 decks648 decks
65%synergy
Blood Artist
75%inclusion489 decks648 decks
64%synergy
Luminous Broodmoth
66%inclusion430 decks648 decks
64%synergy
Top Cards
Swords to Plowshares
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16%synergy
Cruel Celebrant
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64%synergy
Goblin Bombardment
68%inclusion15 decks22 decks
63%synergy
Skullclamp
66%inclusion429 decks648 decks
55%synergy
Warren Soultrader
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60%synergy
Geralf's Messenger
63%inclusion409 decks648 decks
63%synergy
Path to Exile
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16%synergy
Solemnity
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62%synergy
Cathars' Crusade
63%inclusion406 decks648 decks
57%synergy
Dark Ritual
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37%synergy
Game Changers
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39%inclusion251 decks648 decks
19%synergy
Rhystic Study
36%inclusion4 decks11 decks
13%synergy
Smothering Tithe
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10%synergy
Vampiric Tutor
26%inclusion169 decks648 decks
11%synergy
Teferi's Protection
25%inclusion162 decks648 decks
8%synergy
Jeska's Will
23%inclusion5 decks22 decks
7%synergy
Gaea's Cradle
19%inclusion5 decks27 decks
13%synergy
Underworld Breach
18%inclusion4 decks22 decks
12%synergy
Gamble
18%inclusion4 decks22 decks
9%synergy
Ancient Tomb
16%inclusion106 decks648 decks
7%synergy
Creatures
Umbral Collar Zealot
60%inclusion389 decks648 decks
57%synergy
Marionette Apprentice
59%inclusion385 decks648 decks
55%synergy
Vizier of Remedies
58%inclusion373 decks648 decks
57%synergy
Glen Elendra Archmage
55%inclusion6 decks11 decks
52%synergy
Grim Haruspex
54%inclusion353 decks648 decks
52%synergy
Solemn Simulacrum
51%inclusion333 decks648 decks
39%synergy
Corpse Knight
50%inclusion325 decks648 decks
45%synergy
Gray Merchant of Asphodel
48%inclusion312 decks648 decks
40%synergy
Eternal Witness
48%inclusion13 decks27 decks
31%synergy
Yawgmoth, Thran Physician
48%inclusion311 decks648 decks
45%synergy
Sephiroth, Fabled SOLDIER
46%inclusion299 decks648 decks
44%synergy
Esper Sentinel
43%inclusion276 decks648 decks
24%synergy
Butcher Ghoul
42%inclusion274 decks648 decks
42%synergy
Scholar of New Horizons
41%inclusion263 decks648 decks
39%synergy
Witch Enchanter
40%inclusion262 decks648 decks
33%synergy
Bartolomé del Presidio
40%inclusion257 decks648 decks
35%synergy
Morbid Opportunist
37%inclusion242 decks648 decks
30%synergy
Kitchen Finks
37%inclusion10 decks27 decks
37%synergy
Aftermath Analyst
37%inclusion10 decks27 decks
33%synergy
Sakura-Tribe Elder
37%inclusion10 decks27 decks
21%synergy
Birds of Paradise
37%inclusion10 decks27 decks
10%synergy
Elenda, the Dusk Rose
35%inclusion228 decks648 decks
30%synergy
Woe Strider
34%inclusion219 decks648 decks
32%synergy
Midnight Reaper
34%inclusion219 decks648 decks
31%synergy
Wight of the Reliquary
33%inclusion9 decks27 decks
28%synergy
Lotho, Corrupt Shirriff
33%inclusion214 decks648 decks
20%synergy
Sun Titan
29%inclusion190 decks648 decks
21%synergy
River Kelpie
27%inclusion3 decks11 decks
26%synergy
Mulldrifter
27%inclusion3 decks11 decks
22%synergy
Mayhem Devil
27%inclusion6 decks22 decks
17%synergy
Braids, Arisen Nightmare
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20%synergy
Teysa Karlov
27%inclusion172 decks648 decks
22%synergy
Melira, Sylvok Outcast
26%inclusion7 decks27 decks
26%synergy
Woodfall Primus
26%inclusion7 decks27 decks
25%synergy
Satyr Wayfinder
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24%synergy
Bloom Tender
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18%synergy
Delighted Halfling
26%inclusion7 decks27 decks
14%synergy
Junji, the Midnight Sky
25%inclusion163 decks648 decks
23%synergy
Pawn of Ulamog
24%inclusion156 decks648 decks
22%synergy
Zack Fair
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22%synergy
Grand Abolisher
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14%synergy
Agate Instigator
23%inclusion5 decks22 decks
20%synergy
Anger
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16%synergy
Charismatic Conqueror
23%inclusion147 decks648 decks
19%synergy
Safehold Elite
22%inclusion6 decks27 decks
22%synergy
Protean Hulk
22%inclusion6 decks27 decks
21%synergy
Lumra, Bellow of the Woods
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20%synergy
Voice of Victory
22%inclusion144 decks648 decks
16%synergy
Icetill Explorer
22%inclusion6 decks27 decks
15%synergy
Avacyn's Pilgrim
22%inclusion6 decks27 decks
10%synergy
Instants
Anguished Unmaking
51%inclusion333 decks648 decks
27%synergy
Deadly Dispute
50%inclusion327 decks648 decks
38%synergy
Village Rites
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32%synergy
Counterspell
36%inclusion4 decks11 decks
-5%synergy
Generous Gift
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14%synergy
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3%synergy
Flare of Fortitude
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22%synergy
Fell the Profane
28%inclusion181 decks648 decks
19%synergy
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27%inclusion175 decks648 decks
13%synergy
Malakir Rebirth
24%inclusion153 decks648 decks
15%synergy
Deflecting Swat
23%inclusion5 decks22 decks
6%synergy
Culling the Weak
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18%synergy
Heroic Intervention
22%inclusion6 decks27 decks
-8%synergy
Despark
22%inclusion143 decks648 decks
8%synergy
Enlightened Tutor
21%inclusion138 decks648 decks
6%synergy
Corrupted Conviction
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16%synergy
Worldly Tutor
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Silence
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Plumb the Forbidden
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12%synergy
Chaos Warp
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-16%synergy
Fracture
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7%synergy
Flawless Maneuver
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1%synergy
Eladamri's Call
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2%synergy
Entomb
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4%synergy
Saw in Half
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6%synergy
Stroke of Midnight
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-1%synergy
Flare of Malice
8.2%inclusion53 decks648 decks
6%synergy
Cabal Ritual
8.2%inclusion53 decks648 decks
3%synergy
Imp's Mischief
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4%synergy
Reprieve
7.7%inclusion50 decks648 decks
3%synergy
Dawn's Truce
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1%synergy
Clever Concealment
7.3%inclusion47 decks648 decks
3%synergy
Mortify
6.9%inclusion45 decks648 decks
-4%synergy
Sorceries
Reanimate
53%inclusion344 decks648 decks
34%synergy
Victimize
49%inclusion317 decks648 decks
37%synergy
Damn
48%inclusion313 decks648 decks
33%synergy
Diabolic Intent
45%inclusion294 decks648 decks
38%synergy
Toxic Deluge
34%inclusion223 decks648 decks
16%synergy
Three Visits
30%inclusion8 decks27 decks
5%synergy
Farseek
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-6%synergy
Faithless Looting
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11%synergy
Eerie Ultimatum
26%inclusion7 decks27 decks
15%synergy
Nature's Lore
26%inclusion7 decks27 decks
-6%synergy
Cultivate
22%inclusion6 decks27 decks
-20%synergy
Blasphemous Edict
19%inclusion121 decks648 decks
13%synergy
Ruinous Ultimatum
18%inclusion4 decks22 decks
-1%synergy
Blasphemous Act
18%inclusion4 decks22 decks
-15%synergy
Night's Whisper
16%inclusion105 decks648 decks
7%synergy
Bridgeworks Battle
15%inclusion4 decks27 decks
11%synergy
Agadeem's Awakening
13%inclusion85 decks648 decks
10%synergy
Austere Command
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1%synergy
Living Death
12%inclusion75 decks648 decks
6%synergy
Kodama's Reach
11%inclusion3 decks27 decks
-16%synergy
Grim Tutor
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6%synergy
Sevinne's Reclamation
9.3%inclusion60 decks648 decks
2%synergy
Sign in Blood
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0%synergy
Imperial Seal
8.8%inclusion57 decks648 decks
4%synergy
Farewell
8.5%inclusion55 decks648 decks
-4%synergy
Dread Return
7.4%inclusion48 decks648 decks
2%synergy
Kindle the Inner Flame
7.1%inclusion1 decks14 decks
7%synergy
Buried Alive
6.8%inclusion44 decks648 decks
1%synergy
Wrath of God
6.5%inclusion42 decks648 decks
2%synergy
Damnation
6.2%inclusion40 decks648 decks
0%synergy
Exsanguinate
6.0%inclusion39 decks648 decks
-1%synergy
Morningtide's Light
5.6%inclusion36 decks648 decks
5%synergy
Vindicate
5.4%inclusion35 decks648 decks
0%synergy
Beseech the Mirror
5.2%inclusion34 decks648 decks
2%synergy
Feed the Swarm
5.2%inclusion34 decks648 decks
-11%synergy
Utility Artifacts
Lightning Greaves
46%inclusion301 decks648 decks
22%synergy
Blasting Station
40%inclusion257 decks648 decks
39%synergy
Swiftfoot Boots
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-3%synergy
The Great Henge
22%inclusion6 decks27 decks
13%synergy
Birthing Pod
19%inclusion5 decks27 decks
17%synergy
Hedge Shredder
19%inclusion5 decks27 decks
16%synergy
Oketra's Monument
13%inclusion86 decks648 decks
12%synergy
Bolas's Citadel
13%inclusion82 decks648 decks
5%synergy
Jet Medallion
12%inclusion80 decks648 decks
9%synergy
The One Ring
12%inclusion75 decks648 decks
3%synergy
Pearl Medallion
10%inclusion63 decks648 decks
7%synergy
Spawning Pit
7.3%inclusion47 decks648 decks
7%synergy
Enchantments
Bastion of Remembrance
57%inclusion371 decks648 decks
51%synergy
The Meathook Massacre
45%inclusion294 decks648 decks
40%synergy
Black Market Connections
36%inclusion236 decks648 decks
24%synergy
Mystic Remora
36%inclusion4 decks11 decks
20%synergy
Grave Pact
33%inclusion215 decks648 decks
29%synergy
Bitterblossom
32%inclusion208 decks648 decks
28%synergy
Thran Vigil
31%inclusion204 decks648 decks
31%synergy
Impact Tremors
27%inclusion6 decks22 decks
17%synergy
Phyrexian Arena
27%inclusion172 decks648 decks
11%synergy
Greater Good
26%inclusion7 decks27 decks
21%synergy
Land Tax
15%inclusion94 decks648 decks
8%synergy
Animate Dead
14%inclusion91 decks648 decks
5%synergy
Thunder of Unity
14%inclusion3 decks22 decks
12%synergy
Dictate of Erebos
12%inclusion79 decks648 decks
9%synergy
Sothera, the Supervoid
11%inclusion72 decks648 decks
10%synergy
Funeral Room // Awakening Hall
11%inclusion72 decks648 decks
9%synergy
Tribute to the World Tree
11%inclusion3 decks27 decks
6%synergy
Sylvan Library
11%inclusion3 decks27 decks
2%synergy
Necropotence
10%inclusion65 decks648 decks
5%synergy
Martyr's Cause
7.7%inclusion50 decks648 decks
7%synergy
Barrensteppe Siege
6.8%inclusion44 decks648 decks
5%synergy
Fanatical Devotion
6.2%inclusion40 decks648 decks
6%synergy
Trouble in Pairs
6.2%inclusion40 decks648 decks
2%synergy
Grave Venerations
5.5%inclusion25 decks453 decks
3%synergy
Blind Obedience
5.1%inclusion33 decks648 decks
-1%synergy
Planeswalkers
Grist, the Hunger Tide
22%inclusion6 decks27 decks
18%synergy
Liliana, Dreadhorde General
16%inclusion101 decks648 decks
12%synergy
Tyvar, Jubilant Brawler
15%inclusion4 decks27 decks
11%synergy
Vivien on the Hunt
11%inclusion3 decks27 decks
11%synergy
Vivien, Champion of the Wilds
11%inclusion3 decks27 decks
10%synergy
Elspeth, Storm Slayer
7.9%inclusion51 decks648 decks
3%synergy
Utility Lands
Phyrexian Tower
61%inclusion398 decks648 decks
53%synergy
Urborg, Tomb of Yawgmoth
44%inclusion286 decks648 decks
35%synergy
Bojuka Bog
44%inclusion282 decks648 decks
14%synergy
Boseiju, Who Endures
37%inclusion10 decks27 decks
18%synergy
Shifting Woodland
33%inclusion9 decks27 decks
26%synergy
High Market
31%inclusion204 decks648 decks
29%synergy
Reliquary Tower
29%inclusion188 decks648 decks
-1%synergy
Mistrise Village
27%inclusion3 decks11 decks
19%synergy
Otawara, Soaring City
27%inclusion3 decks11 decks
11%synergy
Takenuma, Abandoned Mire
26%inclusion169 decks648 decks
17%synergy
Cabal Coffers
22%inclusion144 decks648 decks
13%synergy
Susur Secundi, Void Altar
20%inclusion129 decks648 decks
17%synergy
Vault of the Archangel
19%inclusion121 decks648 decks
7%synergy
Eiganjo, Seat of the Empire
17%inclusion109 decks648 decks
10%synergy
Abandoned Air Temple
15%inclusion85 decks567 decks
10%synergy
Midgar, City of Mako
13%inclusion84 decks648 decks
9%synergy
Westvale Abbey
12%inclusion75 decks648 decks
9%synergy
Nesting Grounds
11%inclusion73 decks648 decks
9%synergy
Command Beacon
9.3%inclusion60 decks648 decks
4%synergy
Urza's Saga
9.3%inclusion60 decks648 decks
2%synergy
Spymaster's Vault
9.1%inclusion59 decks648 decks
6%synergy
Nykthos, Shrine to Nyx
6.6%inclusion43 decks648 decks
1%synergy
Mana Artifacts
Sol Ring
93%inclusion604 decks648 decks
10%synergy
Arcane Signet
89%inclusion578 decks648 decks
17%synergy
Talisman of Hierarchy
65%inclusion420 decks648 decks
39%synergy
Orzhov Signet
52%inclusion334 decks648 decks
28%synergy
Talisman of Conviction
45%inclusion10 decks22 decks
21%synergy
Talisman of Indulgence
45%inclusion10 decks22 decks
18%synergy
Fellwar Stone
30%inclusion194 decks648 decks
9%synergy
The Soul Stone
19%inclusion123 decks648 decks
15%synergy
Mind Stone
15%inclusion100 decks648 decks
1%synergy
Thought Vessel
15%inclusion95 decks648 decks
-3%synergy
Lotus Petal
11%inclusion73 decks648 decks
4%synergy
Chrome Mox
9.3%inclusion60 decks648 decks
3%synergy
Mana Vault
7.7%inclusion50 decks648 decks
2%synergy
Crowded Crypt
5.2%inclusion34 decks648 decks
4%synergy
Mox Diamond
5.1%inclusion33 decks648 decks
1%synergy
Lands
Breeding Pool
100%inclusion8 decks8 decks
58%synergy
Command Tower
90%inclusion582 decks648 decks
16%synergy
Temple Garden
85%inclusion23 decks27 decks
46%synergy
Godless Shrine
83%inclusion540 decks648 decks
42%synergy
Hallowed Fountain
82%inclusion9 decks11 decks
42%synergy
Overgrown Tomb
81%inclusion22 decks27 decks
40%synergy
Watery Grave
73%inclusion8 decks11 decks
31%synergy
Isolated Chapel
71%inclusion463 decks648 decks
38%synergy
Vault of Champions
65%inclusion424 decks648 decks
42%synergy
Blood Crypt
64%inclusion14 decks22 decks
26%synergy
Caves of Koilos
64%inclusion412 decks648 decks
34%synergy
Stomping Ground
63%inclusion5 decks8 decks
21%synergy
Shattered Sanctum
60%inclusion387 decks648 decks
45%synergy
Savai Triome
59%inclusion13 decks22 decks
35%synergy
Marsh Flats
58%inclusion379 decks648 decks
48%synergy
Sacred Foundry
55%inclusion12 decks22 decks
18%synergy
Bleachbone Verge
53%inclusion344 decks648 decks
45%synergy
Fetid Heath
53%inclusion342 decks648 decks
39%synergy
Indatha Triome
52%inclusion14 decks27 decks
24%synergy
Zagoth Triome
50%inclusion4 decks8 decks
22%synergy
Steam Vents
50%inclusion4 decks8 decks
12%synergy
Tainted Field
48%inclusion309 decks648 decks
35%synergy
Shadowy Backstreet
43%inclusion281 decks648 decks
33%synergy
Spectator Seating
41%inclusion9 decks22 decks
18%synergy
Undergrowth Stadium
41%inclusion11 decks27 decks
18%synergy
Brightclimb Pathway
40%inclusion256 decks648 decks
31%synergy
Spara's Headquarters
38%inclusion3 decks8 decks
10%synergy
Jetmir's Garden
38%inclusion3 decks8 decks
9%synergy
Underground Mortuary
37%inclusion10 decks27 decks
24%synergy
Bountiful Promenade
37%inclusion10 decks27 decks
15%synergy
Luxury Suite
36%inclusion8 decks22 decks
12%synergy
Sunpetal Grove
33%inclusion9 decks27 decks
5%synergy
Woodland Cemetery
33%inclusion9 decks27 decks
1%synergy
Shineshadow Snarl
32%inclusion207 decks648 decks
20%synergy
Sulfurous Springs
32%inclusion7 decks22 decks
8%synergy
Wastewood Verge
30%inclusion8 decks27 decks
22%synergy
Lush Portico
30%inclusion8 decks27 decks
20%synergy
Savannah
30%inclusion8 decks27 decks
17%synergy
Bayou
30%inclusion8 decks27 decks
16%synergy
Exotic Orchard
29%inclusion191 decks648 decks
-7%synergy
Tundra
27%inclusion3 decks11 decks
13%synergy
Morphic Pool
27%inclusion3 decks11 decks
3%synergy
Raffine's Tower
27%inclusion3 decks11 decks
3%synergy
Sea of Clouds
27%inclusion3 decks11 decks
3%synergy
Battlefield Forge
27%inclusion6 decks22 decks
-1%synergy
Dragonskull Summit
27%inclusion6 decks22 decks
-7%synergy
Clifftop Retreat
27%inclusion6 decks22 decks
-8%synergy
Deathcap Glade
26%inclusion7 decks27 decks
13%synergy
Silent Clearing
23%inclusion152 decks648 decks
19%synergy
Elegant Parlor
23%inclusion5 decks22 decks
15%synergy